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- 2 Sheets-sheaf 2. U. L-BVEY.

Furnace,

' No. 227,906. Patented May-'25, 1880.

ajnlranjo r 3/ did Him PHOTO-UTHOGRAFHER WASHINGTON. D. C

UNITED STATES PATENT OFFICE.

CHARLES LEVEY, OF TORONTO, ONTARIO, -CANADA.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 227,906, dated May 25, 1880. Application filed June 10, 1879.

To all whom it may concern Be it known that I, CHAS. LEVEY, of the city of Toronto, in the county of York and Province of Ontario, Canada, engineer, have invented Improvements in Furnaces, of which the following is a specification.

The object of my invention is the consumption of smoke and economy of fuel by the combination of muffle B, hydro-oxygen apparatus M K, mixing-chamber O, and combustion-chamber D.

Figure 1 is a cross-section of the muffle B, grates Gr, flnes l and m, showing also the general arrangement of the brick-work, boiler, and furnace. Fig. 2 is a longitudinal section, showing fines m and l, mixing-chamber O, and bridge-Wall I. Fig. 3 is a longitudinal section, showing, on a smaller scale, the general arrangement in that direction and other details of construction.

My invention relates to that class of furnaces designed for the perfect combustion of fuel, the prevention of smoke, and the consequent economy of fuel; and it consists in arranging under the boiler a muffle or arch made of fire-brick or other refractory material. Said arch entirely surrounds the furnace or firechamber, and is provided with apertures enlarging in diameter from the inside. In rear of the arched fire-chamber'is located a mixing-chamber, in which steam, air, and the products of combustion are made to commingle and become thoroughly mixed, and in this state pass to the combustion-chamber through perforations or flues, where any unconsumed gases escaping from the other chamber are entirely consumed, thus insuring nearly perfect combustion and utilizing all the fuel.

In order that the fuel and gases above mentioned may be thoroughly consumed the brick arches must be kept intensely heated, so that when the gases impinge against their sides said gases are immediately ignited and consumed.

The operation is as follows: Fire being kindled on the grate G, the products of combustion pass through the perforations in the muffle B to the mixingchamber O and combustion-chamber D. These parts soon become intensely hot, and steam is introduced by the pipe 70, which, in its passage through the flues m, meets and continues with the carbonaceous gases from the fuel, and these combined are consumed and generate heat.

I claim as my invention- 1. In a furnace, the combination of the arched chamber or muffle B, provided with tapering perforations or flues, as described, the mixing-chamber C, also provided with exit fines or perforations, and combustion-chamber D, whereby the gases arising from the fuel are entirely consumed, as herein set forth and described.

2. The arched chamber B, perforated, as de scribed, chamber 0, having its arch provided with tapering fines or perforations, steam -pi pes k, and combustion-chamber D, all constructed and arranged for the purposes herein set forth.

3. The combination of the grates G, muffle B, flues lm, mixing-chamber O, bridge-wall I, combustion-chamber D, and steampipe 70, substantially as and for the purpose hereinbefore set forth.

CHAS. LEVEY.

Witnesses:

FRED KING, A. O. BEARDMORE. 

